package com.nowcoder.community.controller;

import com.nowcoder.community.entity.DiscussPost;
import com.nowcoder.community.entity.Page;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.DiscussPostService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author tang
 * @create 2020-10-25
 */
@Controller
public class HomeController implements CommunityConstant {
    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private UserService userService;

    @Autowired
    private LikeService likeService;

    @RequestMapping(path = "/index",method = RequestMethod.GET)
    public String getIndexPage(Model model, Page page){
        //before the method, page-->model
        page.setRows(discussPostService.findDiscussPostRows(0));
        page.setPath("/index");

        List<Map<String,Object>> discussPosts = new ArrayList<>();
        List<DiscussPost> list = discussPostService.findDiscussPosts(0,page.getOffset(),page.getLimit());
        if (list!=null){
            for(DiscussPost post:list){
                Map<String,Object> map = new HashMap<>(1);
                map.put("post",post);

                User user = userService.findUserById(post.getUserId());
                map.put("user",user);

                long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST,post.getId());
                map.put("likeCount",likeCount);

                discussPosts.add(map);
            }
        }
        model.addAttribute("discussPosts",discussPosts);
        return "/index";
    }

    @GetMapping(path = "/error")
    public String getErrorPage(){
        return "/error/500";
    }
}
